need some help with ram.i just finsihed building my sandy bridge system last night which includesGigabyte p67 ud7 mobointel 2600kgigabyte gtx580mushkin redline ramthe problem i'm having is the ram is showing as 1333 mhz in the bios but the ram spec is 1600 mhz and in cpuz the memory channels is greyed out so i don't know if its running dual channel mode.what i need to know is how do i get the ram up to 1600 mhz, please could i have a step by step guide because this is all new to meand how do i find out if its running in dual channel.Thanks in advace

On the board, there will be 4 DIMM slots, 2 of one colour, and 2 of another. To run in dual channel, your 2GB sticks should go in the same coloured slot. So if 4GB, only one colour should be taken. You need to set the speed via the bios. Make sure your system is stable at 1333MHz RAM, then OC your CPU to whatever you want, and make sure it's fully stable. Then change the RAM voltage to 1.5V, and boot at 1333MHz. All should go well and it should boot into windows. Then go to bios and change the RAM speed to 1600MHz. Boot and make sure it runs well at 1600MHz. Where it asks for ram timings in the bios, enter the. Timings shown on the sticker on the ram.Keep testing and booting to make sure the ram is working. If it doesn't boot at 1600Mhz, increase the ram voltage a small amount. Keep doing this (increase voltage, then boot) until your ram runs at 1600MHz with the correct timings, and boots into windows. I would recommend you don't exceed a voltage of 1.6V.

Thanks again Alex, so are you saying i need to o/c sandy first?

On the board, there will be 4 DIMM slots, 2 of one colour, and 2 of another. To run in dual channel, your 2GB sticks should go in the same coloured slot. So if 4GB, only one colour should be taken. You need to set the speed via the bios. Make sure your system is stable at 1333MHz RAM, then OC your CPU to whatever you want, and make sure it's fully stable. Then change the RAM voltage to 1.5V, and boot at 1333MHz. All should go well and it should boot into windows. Then go to bios and change the RAM speed to 1600MHz. Boot and make sure it runs well at 1600MHz. Where it asks for ram timings in the bios, enter the. Timings shown on the sticker on the ram.Keep testing and booting to make sure the ram is working. If it doesn't boot at 1600Mhz, increase the ram voltage a small amount. Keep doing this (increase voltage, then boot) until your ram runs at 1600MHz with the correct timings, and boots into windows. I would recommend you don't exceed a voltage of 1.6V.

I have tried that. When I change it to 1600 and put the v to 1.6 and my computer for some reason is unstable. I can get into windows if reboot from bios but once I shut it off and turn it back on the bios doesn't even load. Requires me to shut off the PSU and then boot back up. It gives me a "overclock failed" message. I will have to go back to the packaging to check but I think the timings are at the what they say on the box.

http://www.clunk.org.uk/forums/overclocking/39184-p67-sandy-bridge-overclocking-guide-beginners.htmlFollow that guide.